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Effect of Water Soluble fraction from Japanese Larch Wood on Sawdust Cultivation of Lentinula edodes  

Cho, Nam-Seok (School of Forest Resources, Chungbuk National University)
Chung, Hung-Chae (Dept. of Biology, Korea National Univ. of Education)
Kim, Dong-Hun (Dept. of Biology, Korea National Univ. of Education)
Lee, Sang-Sun (Dept. of Biology, Korea National Univ. of Education)
Ohga, Shoji (Faculty of Agriculture. Kyushu University)
Leonowicz, A. (Department of Biochemistry, Maria Curie-Sklodowska University)
Publication Information
Journal of the Korean Wood Science and Technology / v.32, no.1, 2004 , pp. 35-44 More about this Journal
Abstract
The water soluble fractions(WSF) from Japanese larch wood were isolated, purified by anion exchange resin and Sephadex gel filtration and identified its chemical structure by means of periodate oxidation and methylation reactions. Its major components are arabinose and galactose (1 : 3.4). Based on the results of periodate oxidation, methylation and gas chromatographic analysis of purified WSF, main chain is composed of β-1,3-glycosidic linkage among D-galactopyranoses, and two different side chains; β-1,6-glycosidic linkage among 2-3 units of D-galactopyranoses and β-1,6-glycosidic linkage between 1-2 units of D-galactopyranose and L-arabinopyranose. Addition of WSF to culture media of oak mushroom (Lentinula edodes) accelerated the mycelial growth. In the case of PDA cultures, 2 percent addition of WSF in Sanlim No. 6 strain and 4 percent of WSF in Mok-H strain mostly enhanced the mycelial growth of the mushroom. In the case of sawdust cultures, 4 percent addition of WSF in two strains showed the best mycelial growth. High percentages addition of WSF inhibited mycelial growth of the mushroom. Mushroom production was increased with addition of WSF. By the addition of WSF, ergosterol contents in the media were quite high at the colonized stage and rapidly increased at the fruiting stage. Therefore the ergosterol content could be utilized as an indicator to evaluate the culture maturity for the mushroom fruiting.
Keywords
Japanese larch wood; Water soluble fraction (WSF); Arabinogalactan; Lentinula edodes; Ergosterol;
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